GB769470A - Improvements in radio or television aerials - Google Patents
Improvements in radio or television aerialsInfo
- Publication number
- GB769470A GB769470A GB37189/54A GB3718954A GB769470A GB 769470 A GB769470 A GB 769470A GB 37189/54 A GB37189/54 A GB 37189/54A GB 3718954 A GB3718954 A GB 3718954A GB 769470 A GB769470 A GB 769470A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dipole
- folded
- folded dipole
- frequency
- arm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
- H01Q5/48—Combinations of two or more dipole type antennas
- H01Q5/49—Combinations of two or more dipole type antennas with parasitic elements used for purposes other than for dual-band or multi-band, e.g. imbricated Yagi antennas
Abstract
769,470. Aerials. WOLSEY TELEVISION, Ltd. Dec. 13, 1955 [Dec. 23, 1954], No. 37189/54. Class 40(7) An aerial system intended for the reception of signals in two frequency bands comprises a dipole 1, la, half a wavelength long at a frequency in the lower band and a folded dipole 6, 7, 8, 9 for the higher frequency band associated with the dipole 1, 1a, and supported with it on a common cross-arm 4 which also carries a least a reflector element 12 for the folded dipole. The cross-arm may also carry a reflector 2 for the dipole 1, 1a, and a suitable number of directors 14, 15, 16 for the folded dipole. The higher frequency elements may be made in V configuration, preferably with each part of the element making an angle of 60 degrees with the cross arm as shown. The various supporting brackets 5, 13 and 17 may have the arms attached to them in an angularly adjustable manner so that the angle included in the V can be varied. As shown the folded dipole is associated with the dipole 1, 1a, by the centre part of the latter (between support brackets 18 and 19 being included in the folded dipole also. A common feeder is used for the two dipoles. The coupling members 10 and 11 of the folded dipole are preferably spaced in from the ends of the elements 6, 7, 8 and 9 so that the free ends act as a resistance compensating device for reception at the higher frequency. Instead of a simple folded dipole. being used a three element type such as that shown in Fig. 3 may be used. Insulators 22 and 23 on the lower frequency dipole help to support the folded structure. In an alternative form of three element folded dipole an outer element is associated with the lower frequency dipole (Fig. 4, not shown). In any of the embodiments the extreme ends of the folded dipole members may be closed by a further pair of coupling members.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB37189/54A GB769470A (en) | 1954-12-23 | 1954-12-23 | Improvements in radio or television aerials |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB37189/54A GB769470A (en) | 1954-12-23 | 1954-12-23 | Improvements in radio or television aerials |
Publications (1)
Publication Number | Publication Date |
---|---|
GB769470A true GB769470A (en) | 1957-03-06 |
Family
ID=10394497
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB37189/54A Expired GB769470A (en) | 1954-12-23 | 1954-12-23 | Improvements in radio or television aerials |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB769470A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0177630A1 (en) * | 1983-08-10 | 1986-04-16 | Kathrein-Werke Kg | Combination of antennas |
-
1954
- 1954-12-23 GB GB37189/54A patent/GB769470A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0177630A1 (en) * | 1983-08-10 | 1986-04-16 | Kathrein-Werke Kg | Combination of antennas |
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